Originally Posted by
traveller929
So some of you are aware that you can't add frequent flyer/membership numbers to your reservations thru C1 Travel portal (which uses Hopper). Well you probably won't be able to add them from the company you booked with either. I just experienced that with Hertz. Had some points and I got the President's Circle perk so I wanted to try it. I booked the appropriate class thru C1 travel; no place for a member number. I call up Hertz and say I'm a President's Circle Status and I want to add my member number to my reservation. They find the reservation but say that they can't add Hertz number because it was booked through a 3rd party, Hopper. I would have to cancel the current reservation and rebook through Hertz. I call C1 Travel and they call Hertz and same story, can't add Hertz number. I found my reservation on Hertz website and app but no place to link it to my Hertz membership.
Also booked Marriott hotel too. Went and tried to find the reservation on Marriott's site to link to my account and the reservation number is not valid in their system. Marriott's true confirmations are numbers; Hopper uses letters (plus it was one character too long). Marriott post a disclaimer that if you used a 3rd party to book the stay, that you should contact them to make changes.
Sucks to hear about Hertz. I haven't needed to do this yet, but I have contacted both Capital One and Hertz to check and re-check that it would be possible to add the loyalty information after the reservation is made through the portal, and they both said it would be possible... sigh. Hopefully they will still give you upgrade benefits when you check in at the Hertz front desk and tell them your status.
I kind of figured it wouldn't be possible to do with Marriott. But one thing I noticed is that Hopper sometimes adds an "H-" to the beginning of a reservation number, so it might be that they are using Marriott's actual confirmation number, but it's one character too long because there's an extra "H" at the beginning. Try removing that "H" (if it's there) when checking through Marriott's site.